This happened to one of my rMBP 15" near the camera, Apple Store told me that its caused by oil in your fingers. They basically said to avoid touching the screen when you open the lid.
"The point, explains Carmine Gallo, who is writing a book on the inside workings of the Apple Store, is to get people to touch the devices. "The main reason notebook computers screens are slightly angled is to encourage customers to adjust the screen to their ideal viewing angle," he says -- "in other words, to touch the computer.""
"The point, explains Carmine Gallo, who is writing a book on the inside workings of the Apple Store, is to get people to touch the devices. "The main reason notebook computers screens are slightly angled is to encourage customers to adjust the screen to their ideal viewing angle," he says -- "in other words, to touch the computer.""
http://www.theatlantic.com/technology/archive/2012/06/the-sc...